SAP Message W0137 - Number range already used for layout maintenance

Diagnosis
You entered a layout number range that is already reserved for aspecific layout type (such as a product cataloglayout, a promotion product catalog layout or a plant layout).

System Response
The relevant layout area cannot be assigned to an original system inALR inbound for product catalogs.

Procedure
Select a different external layout number range or create a layoutnumber range.